MESON Chess Problem Database

Problem Display
PID: 231700 (1B6/8/4P1P1/K1pk4/3pr3/5Q2/P7/2R5 w - - 0 1)

Anonymous

Pen & Pencil, 1888

(First published on Sat Dec 1 1888)

1B6/8/4P1P1/K1pk4/3pr3/5Q2/P7/2R5

#2

7 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxe4#
    • 1...Kxe6
      • 2.Qf7#
  • Tries
    • 1.Re1?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Kxe6
        • 2.Qf7#
      • 1...d3
        • 2.Qxe4#
      • 1...c4!
    • 1.Rxc5+?
      • 1...Kxe6
        • 2.Qf7#
      • 1...Kxc5!
    • 1.Qb3+?
      • 1...c4
        • 2.Qxc4#
      • 1...Kc6!
    • 1.Qf5+?
      • 1...Kc6
        • 2.Qxe4#
      • 1...Re5!
  • Keys
    • 1.Rc4!
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kc6
        • 2.Qxe4#
      • 1...Kxe6
        • 2.Qf7#
      • 1...d3
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);P_SPINP(c),S_FLIGHT::QAB(C),XR(b)
    • K(d);N_SPINR(b),OGATEB,S_FLIGHT,XP(E)::QAB1(C)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT::QAB1(C)
        • K(d);S_FLIGHT::QAB(C),XR(b)
        • K(d);OGATEB,S_FLIGHT,XP(E)::QAB1(C)
        • P(a);::QAB1(C),XR(b)
      • Refutation
        • P(c);
    • Try
      • R(A);CHECK,XP(c)
      • Vars
        • K(d);N_SPINR(b),S_FLIGHT,XP(E)::QAB1(C)
      • Refutation
        • K(d);N_SPINR(b),P-FLIGHT,XR(A)
    • Try
      • Q(C);CHECK,N_PINR(b)
      • Vars
        • P(c);P_SPINP(c)::QAB1(C),XP(c)
      • Refutation
        • K(d);P_SPINP(c),S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINR(b)
      • Vars
        • K(d);P_SPINP(c),S_FLIGHT::QAB(C),XR(b)
      • Refutation
        • R(b);P_SPINR(b)
  • Actual
    • R(A);
    • Vars
      • K(d);N_SPINR(b),OGATEB,S_FLIGHT,XR(A)::QAB1(C)
      • K(d);P_SPINP(c),S_FLIGHT::QAB(C),XR(b)
      • K(d);N_SPINR(b),OGATEB,S_FLIGHT,XP(E)::QAB1(C)
      • P(a);::QAB1(C),XR(b)
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